After sprinting for the last thirty seconds of my run, and envisioning myself crossing the finish line of the imaginary race that has propelled me forward through my long run, I like to walk to cool down. I jog for a few minutes then slowly decrease my speed to a walk. Not only does walking help to lower my heart rate, it also is an active stretch for my hip flexors, the muscles at the front of the pelvis that work hard when running. Walking after running seems to decrease my post running stiffness for all my leg joints. Plus, when I walk in the house I am not too sweaty to hug my girls, who have suddenly become squeamish about sweat.